Typewriting machine



May 4 1926.

c. M. CREWS 4 TYPEWRITING MACHINE Filed June '7, 19524 I Patented vMay4, 1926.

A, 1,583,279 PA ENT OFF-ICE.

UNITED-sures CLARENCE I. CREWS, OF BROOKLYN, -NEW YORK, ASSIGNOR' TOUNDERWOOD TYPE- WRITER COMPANY, OF NEW YORK,.N. Y., A CORPORATION OFDELAWARE TYP WRITING' MACHINE Application filed June 7, 1924'. SerialNo, 718,478. I

To all whom it may concern:

Be it known that I, CLARENCE M. Cnnws,

a citizen of the United States, residing in Brooklyn Borough, in thecounty of Kings,

6 city and State of New'York, have invented certain new and usefulImprovements in Typewriting Machines, of which the following is aspecification.

This invention relates to continuous billing typewriting machines. Ina'machine of this class a set of carbons is ordinarilyattached to acarbon-carrier which is advance able toward the platen with aninterleaved Work-web at line-feeding, and is retractiblefrom the platenand relatively to the interleaved work-web upon displacement of theplaten, to strip thecarbons froma typed form-section and interleave themwith the form-section next to be typed. The carbons are arrested by astationary rear stop, always in the same rearward position, and hencethe type blows at the writing of suc cessive forms fall always insubstantially the same locations on the carbons, which causes thecarbons to be worn out in stripes,

so that they must be removed from the machine and replaced without beingused to their utmost capacity. ing the carbons is especially wastefulbecause the carbons are ordinarily quite long.

The changing of the carbons in the machine, moreover, is a timeconsuming operation which it is desirable to postpone and avoid as muchas possible. 4

It is an object of the present invention to provide means. for causingthe carbons of a continuous billing machine to beworn out uniforml sothat the maximum use, and len h'o service, may be obtained from the 49car ons.

To this end provision may be. made of means to arrest the retraction ofthe carboncarrier in a slightly different location at successiveretractions thereof, so that the.

5 type blows will becaused to fall upon slightly different portions ofthecarbon at the writing ofthe succeeding forms. As

illustratedherein the carbon-carrier arrest 'mgmean's may'conslst of aneccentric cam,

59 and means engaged and actuated by the carbon-carrier in its rearwardmovement to rotate the cam a, shortdistance, With this arrangement therear-stoppmg position of the -,carbon-carrier is caused automatically toesthe stop-feeding means.

This method of us-- cillate back and forth withina short range,

so that the carbons at successive writings are shifted progressively byfractional line-- space degrees with reference to the writing line ofthe machine and so are completely worn out by the ordinary use of thema:

chine. v V v Other features and advantages will herelnafter appear.

In the accompanaying drawings,

I Figure 1 1s a sectional side elevatlon of a a portion of a continuousb1ll1ng machine having the present improvements applied thereto, themachine bemg cut away at an inter inediate portion for compactness ofillustraion. 1

Figure 2 is a vertical section on a larger scale than Figure 1, taken onthe line 22 of Figure 1, looking in the direction of the arrows, andshowing the details of the stop mechanism.

Figure 3 is a detail View of a portion of Figure 4 is a fragmentarysectional side elevation of the stop-feeding means and carbon-carrierwith the carbon-carrier near the rear limit of its movement.

Figure 5'is a fragmentary plan yiew ofthemechanism shown in Figure 4.

The which is of the type disclosed in the patent to Vvernery & Sm1th,1,132,055, comprises a illustrated typewriting machine,

revoluble cylindrical platen 10 which is j ournaled by its axle 11 in adisplaceable platenframe 12 mounted upon a carriage 13 that travels inletter-feed .and return directions,

as usual. Acarbon-carrier 14 is' mounted to 'travel'toward and from theplaten 10 upon rails 15, forming part of a long carriage extension 16that travels from side to side withvthe carriage and is supported at itsrear upon a rail 17 carried by a rear extension 18 of the machine-frame.A multiple-ply continuous Work-web 19 is led into the machine betweenside-guides 20 atthe 1 rear extremity of the carriage. exten'SionlG, andthence 1s led forward ln'interleaved relation with a set of carbons 21carried by" carbon-blades 22 on the carbon-carrier 14.

The work-web 19 and carbons 21 are'ad I vance'd totgether by the platen10 in con.-v

junction with co-operating-feed-rolls .22 by actuation of the usualline-spacingmecha 'nism (not shown) until the first form is] to the rearby its handle 26 to strip the carbone 21 from the typed web-section andinterleave them with the section next to be t ed. ,7 v

y eretofore'the stop for limiting the rear.- ward movement of thecarbon-carrier has been maintained stationary. According to the presentinvention provision is made of an eccentric cam stop 27 which isrotatably mounted on a shaft 28 fixed in clamping .brackets 29 and 30adjustablysecured upon.

the left rail 15 of the carriage extension 16 a and upon the centrallongitudinal bar 31 of said extension, respectively. 27 is made fast toa ratchet-wheel 32 by means of pins 33 on the ratchet-wheel, and" theposition of the cam 27 and the ratchetwheel' 32 lengthwise of the shaft28 is controlled by the bracket 29 and a collar 34 fast on the shaft 28.An oscillatory arm 35 plays between shoulders'36 and 37 on the bracket29, and carries a pawl 38 whlch is pressed by a spring 39 intoco-operatlve enprojec-ting pawl 41 on the oscillatory arm 35 each vtimethat the carbon-carrier 14 is moved to the rear, to rock the oscillatoryarm from the full-line position of Figure 4 to the rearidot-and-dashline position 35' to impart a feeding step to the ratchet-wheel 32, andthrough the ratchet-wheel to the eccentric cam. stop 27 The parts are soconstructed that the projecting arm 40 leaves engagement with the'pawl41 as seen in dotand-dash lines in Figure 4 when the ratchetwheel 32 hasbeen rotated one toothspace.

'The oscillatory arm 35 is thereupon returned to its normal full-lineposition by a spring 42. The rearward movement of the carbon-v carrier14 is finally arrested by engagement of a rojection 43 on thecarbon-carrier with the out face-of the eccentric cam 27. As theposition of the cam 27 varies continually, due to this pro essivefeeding, the rear limit of the car n-carriers movement iscorrespondingly varied,;so that slightly different portions of thecarbons 2 1 are made effective for each form typed.

The pawl 41 is normally held upright and rigid against ashoulder 44 onthe oscillatory arm 35 -by,-a spring 45. At the forward movement of thecarbon-carrier 14 this spring 45, with the pawl 41, is turned down tothe dot-and-dash line position 41' of Fig- The cam stop ass.

lution of the cam stop 27 the carbon-carrier 14 is arrestedprogressively farther to the rear, and that for the next half revolutionIt will be understood that for a half revoure 4 by the arm 40,permitting said arm to it is arrested progressively farther forward.

In other words, the arresting position oscillates backward and forward.The extent of this oscillation may be slightly less than a doubleline-space, so that in case the machine is set for double line-spacingthe zone within which the first-line type blows fall on the carbons willtouch, butwill not overlap the zone within which the second-line typeblows fall. This variation will not prevent the use of the carbons asnear to the tops of the forms as desired, because the forms have printedheadings which occupy a considerable space at their upper margins. Atthe same time this amount of variation may be had w thout danger of thecarbons being severed at their forward ends with the workweb, by theknife 46. ,The cam is preferably contoured to cause the carbons toprogress by uniform steps," so that every portionwill receive exactlythe same amount of wear.

Variations may be resorted to within the scope of the invention, andportions of the improvements may be used without others.

Having thus described my invention, I

claim: gagement' with the ratchet-wheel 32. The carbon-carrier 14 hasarearwardly-pro ecting arm 40 which engagesan upwardly 1. In acontinuousbilling typewriting ma- .chine, the combination with arevoluble platen and a carbon-carrier retractible from the platen toreposition-the carbons with 7 reference to the work-web and the platen,of means operated automatically by the movement of the carbon-carrier toarrest the carbon-carrier in slightly different position at eachretraction thereof.

2. In a continuous billing typewritin ma- I chine, the combination vwitha revo uble platen and a carbon-carrier retractible from the platen toreposition the carbons with reference to the work-web and the platen, ofanadjustable stop to limit the rearward movement of the carbon-carrier,and means dependent upon the operation of said carboircarrier forautomatically adjusting the stop... c a

1 3. In a continuous billing typewriting machine, the combination with arevoluble platen and a carbon-carrier retractible from I the platentQIGPOSltiOH the carbons with reference to the work-web and the platen,of means automatically to cause-the carbons to be oscillated slowlyby'fractional line-space degrees with reference to the writing line tions.

. 4.- In a continuous billing typewriter machine, the combination with arevoluble platen and a carbon-carrier retractible from the platen toreposition the carbons, of adthroughout an extended period of operajustable means to arrest the retraction of the carbon-carrier andthereby control the position of the carbons with reference to the lineof writing, and means ctuated by the retraction of the carbon carrier toadjust automatically the carbon-carrier arresting means.

5. In a continuous billing typewriti'ng machine, the combination with arevoluble platen and a carbon-carrier retractible from the platen toreposition the carbons with reference to the Work-web, of an eccentricrotatable cam stop in the path-of the carbon-carrier, and means actuatedby the carbon-carrier in its rearward movement to rotate the cam tobring different portions of its surface into position to intercept thecarbon-earrier.

6. In a continuous billing typewriting machine, the combination witharevoluble platen and a. carbon-carrier retractible from the platen toreposition the carbons with reference to the work-web and the platen,

of an eccentric rotatable cam stop in the path of the carbon-carrier, aratchet-wheel fast to the cam, a pawl for feeding the ratchet-wheel stepby step, and means carried by the carbon-carrier to actuate the pawl ateach rearward movementof the carhon-carrier.

7 In a continuous billing typewriting machine, the combination with arevoluble platen and a carbon-carrier retractible from the platen toreposition the carbons with 7 reference to the work-Web and the platen,of

an eccentric rotatable cam stop in the path of the carbon-carrier, aratchet-wheel .fast

to the cam, a pawl for feeding the ratchet? wheel step by step, apawl-carrying arm, a projection on the carbon-carrier for engaging andactuating the pawl-carrying arm to feed the ratchet-wheel a tooth spacein the course of the carbon-carrier retracting movement but not in thelast portion thereof, and means enabling the projection on thecarbonearrier to pass the pawl-carrying arm in thei'orward movement ofthe carbon-carrier.

8, In a continuous billing typewriting machine, the combination with atraveling carriage and a carriage-extension, of a revoluble platen, a.carbon-carrier retractible from the platen to reposition the carbonswith reference to the work-web and the platen, an eccentric rotatablecam' stop in the path of the carbon-carrier, a shaft on which the camstop is mounted, and clam ing brackets for adjustably securing tl ieshaft in various locations upon the carriageextension. 4

9, Ina continuous billing typewriting machine, the combination with arevoluble platen, a carriage, a carriage-extension and a carbon-carrierretractible from the platen ,along the carriage-extension to repositionthe carbons with reference to thework-web justing the stop .and itsfeeding meansv to various positions upon the carriage-extension. 1

oni nnuon M. answerand the platen, of a. carbon-carrier stop,

